It depends on how many consequences you are willing to tolerate.
I’d say it’s already too much. The weather has already changed noticeably in my lifetime, which is really too fast for weather to be changing. I don’t like the number of 100, 105, 110 degree days we get now. Only 25 years ago, these kinds of temperatures were extremely rare, but now we see this extreme heat nearly every year around here. I’m not a fan of the droughts and mandatory water rationing. And the fires! My state has always had wildfires, but not like the ones we have almost every year now. So for me, between the extreme heat, drought, water shortages, and fires that directly impact my own life, I wish it weren’t like this, and I don’t want it to get worse, and I think we have enough CO2.